Which of the following is an elastomer ?
Which of the following is an elastomer ?
A. Thiokol
B. Phenol formaldehyde
C. Urea formaldehyde
D. Polystyrene
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Poly-methyl-methacrylate (PMMA) is known as_______________?A. Bakelite
B. Teflon
C. Perspex
D. Nylon-6Polythene is a/an________________?
Polythene is a/an________________?A. Addition polymerisation product
B. Condensation polymerisation product
C. Thermosetting material
D. None of theseVulcanisation of raw rubber makes it__________________?
Vulcanisation of raw rubber makes it__________________?A. Soft
B. Less elastic
C. Plastic
D. TackyThe rate controlling step in the manufacture of silicone rubber is the_________________?
The rate controlling step in the manufacture of silicone rubber is the_________________?A. Polymer termination step
B. Condensation of siloxane to silicone
C. Initial hydrolysis of silicone monomer
D. None of theseViscose rayon is _______________?
Viscose rayon is _______________?A. Cellulose nitrate
B. Regenerated cellulose nitrate
C. Regenerated cellulose acetate
D. None of theseEbonite is a/an___________________?
Ebonite is a/an___________________?A. Highly vulcanised rubber
B. Natural rubber
C. Unvulcanised raw rubber
D. Adhesive